Plan to prevent natural risks of landslide — Commune de Lafrançaise — Perimeter — Department of Tarn-et-Garonne

This dataset contains the boundaries at the different stages of the development of the PPRN. The characteristic of these perimeters is to be the consequence of an official act and to produce their effects from a specified date. This is the following:
— prescribed scope contained in the prescription order of a PPR (natural or technological);
— scope of risk exposure that corresponds to the scope regulated by the approved RPP. This approved perimeter is a utility easement (PM1 for PPRNs and PM3 for PPRTs);
— scope of study which corresponds to the envelope in which the hazards were studied.

本数据集收录了PPRN在不同发展阶段的边界范围。此类边界的共性特征为：均由官方法定文书确立，并自指定生效日期起产生法律效力。具体如下：
— 纳入PPR审批指令的法定适用范围，涵盖自然型与技术型PPR；
— 风险暴露范围，与获批RPP所规制的范围一致。该获批边界属于公用事业地役权：PPRN对应PM1，PPRT对应PM3；
— 研究范围，即开展危险性研究所覆盖的包络范围。